Add note to scroll-view.coffee

src/scroll-view.coffee

@@ -4,6 +4,10 @@
 #
 # This `View` subclass listens to events such as `page-up`, `page-down`,
 # `move-to-top`, and `move-to-bottom`.
+#
+# FIXME: I don't actually understand if this is useful or not. I think it is
+# a base of package widgets but I don't really understand how the core events
+# work.
 module.exports =
 class ScrollView extends View